She’s trying to make the 2 card counting [divided by 2] add up to the actual count for President. It doesn’t work that way when voters can omit some races, throw either portion of the ballot away or leave it blank.
But the hard count for a particular race is the actual number counted by the machines during the process. That number has nothing to do with the 2nd portion of the ballot that is being counted.
I think that it is reasonable to assume that the number of voters who came through the door is equal to the number of votes cast for the President or 124,031. That first card would have included all the important races. And thus 124,031 of these first cards were cast.
I think that it is also reasonable to assume that some people [349 of them] could have cared less about what was on the second card and walked out with it rather than take the time to fill it out and cast it, thus the 247,713 number.